diff options
| author | Jan Höppner <hoeppner@linux.ibm.com> | 2023-06-09 18:37:50 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-06-09 20:35:52 +0300 |
| commit | ccc45cb4e7271c74dbb27776ae8f73d84557f5c6 (patch) | |
| tree | c1589e0c5688f2736b64158c2d131087803b1fc6 /arch | |
| parent | 8cfb98196cceec35416041c6b91212d2b99392e4 (diff) | |
| download | linux-ccc45cb4e7271c74dbb27776ae8f73d84557f5c6.tar.xz | |
s390/dasd: Use correct lock while counting channel queue length
The lock around counting the channel queue length in the BIODASDINFO
ioctl was incorrectly changed to the dasd_block->queue_lock with commit
583d6535cb9d ("dasd: remove dead code"). This can lead to endless list
iterations and a subsequent crash.
The queue_lock is supposed to be used only for queue lists belonging to
dasd_block. For dasd_device related queue lists the ccwdev lock must be
used.
Fix the mentioned issues by correctly using the ccwdev lock instead of
the queue lock.
Fixes: 583d6535cb9d ("dasd: remove dead code")
Cc: stable@vger.kernel.org # v5.0+
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
Reviewed-by: Stefan Haberland <sth@linux.ibm.com>
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Link: https://lore.kernel.org/r/20230609153750.1258763-2-sth@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions